[R] raster time series statistics

[Jim Lemon]

Hi Herry,
This is probably due to a call to strptime (or similar). No, it
doesn't accept %Y-%m as a valid format. Maybe add a constant day to
all the dates as that will work:

dt<-list(ID=seq(1:24),month=rep(formatC(1:12,flag=0,width=2),2),
 year=sort(rep(2016:2017,12)))
timelst<-paste(unlist(dt['year']),unlist(dt['month']),"01",sep="-")
strptime(timelst,format="%Y-%m-%d")

Jim



On Tue, Mar 6, 2018 at 10:28 AM,  <Alexander.Herr at csiro.au> wrote:
> Hi List,
>
> The following code returns an "Error in as.POSIXlt.character(x, tz, ...) :   character string is not in a standard unambiguous format"
>
> require(raster)
> require(rts)
> require(stringi)
> r <- raster(ncol=100, nrow=100)
> values(r) <- runif(ncell(r))
> list(ID=seq(1:24),month=rep(str_pad(1:12, pad = 0,width = 2 , "left"),2),year=sort(rep(2016:2017,12)))->dt
> stack(r)->s
> r->rs
> for(i in 1:23){
> rs[]<-r[]*i
>   addLayer(s,rs)->s
> print(nlayers(s))
> }
> timelst<-paste0(unlist(dt['year']),'-',unlist(dt['month']))
> rts(s,time=as.yearmon(timelst))->rsts
> str(rsts at time)
> apply.monthly(rsts,mean)
>
> I was expecting that the statistics accept the yearmonth format of the timeslot, as it allows subsetting.
> Any suggestions?
> Thanks
> Herry
>
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